Tenon-machine gage.



' APLIOATION FILED FEB. 17,1912.

J. T. 2111A.

TENON MACHINE GAGE.

2 SHEETS-SHBET 2 WITNEssEs iNvENToR -Josa/ab Z' Zik@ BY UNITED sTATEs PATE E o JOSEPH T. ZIKA, 0F CLEVELAND, OHIO.

TENON-MACHINE GAGE.

speeiaeation of Letters Patent.

Patented Nov. 5, 1912.

Application mea February 17, 1912. semi No. 678,353.

To all whom it may concern: Be it known that I, JOSEPH T. ZIKA, a citizen of the Unitedf States, residing in Cleveland, in the county of Cuyahoga, State of Ohio, have invented a new and usefulv Improvement in Tenon-Machine Gages, of which the following isa specification.

My invention relates to the work table of a tenoning machine and to the stop gages same: Fig. 3 is a -cross section showing theV adjustable bridge bar in elevation: Fig.4 is a longitudinal section of t-he bridge bar, and Fig. 5 is an inverted plan view of the same. Fig. 6 is a partial elevation of a tenoning machine with the improvement attached.

A. B., Figs. 1, 3 and et, represent the work table of an ordinary tenon ,machine having side bars B, which rest upon the ways or guides 51 which support the table on the machine frame.

C is the `adjustable bridge bar forl sup-v porting one end of therwork and is fitted to move between vthe longitudinal side bars A of the work table and to be clamped thereto in whatever position required. The tops of parts B and Cy are in the same plane.

D is a gage strip which is fitted into a T slot at the bottom of the recess 2 in the bridge bar as more clearly shown in Fig. 4:

j this strip is of any desired length to accommodate the stock to be worked, and in its upper fac'e there is provided a longitudinal dovetailed groove 3, into which the stop blocks S and 10 used to determine the` length y of the work, are clamped: this gage strip is clamped into the bridge bar' by a set screw 4, Figs. 2, 3 and 5. c l

5 is a retreating stop which 1s forced upward by the spring 6, Fig. 2, which rests on a shoulder 7 formed in the sliding block 8.

9 isa flat spring secured to the sliding block 10 and bent upward at right angles sufficiently to form anend stop for the work and is used. to gage the work before the tenon is cut; this alsor retreats when long stock is laid on it. Blocks 8 and 10 are fitted to move freely in the dovetail groove 3 inthe gage strip D. lVhen long work is tenoned the bridge C is pushed out to the vextreme end of the work table, thus extending the gage strip to a like distance.

rlhe above description relates to the usual and well known construction of tenon machine work tables forhand feed and my invention consists of improvements thereon.`

Formerly the stop blocks 8 and 10 were lboth clamped into the slot in the strip D by set screws like 13, Fig 2 g. and therefore in- .dependent'of each other; consequently, when setting the stops for a, change in length of stock, both must be set separately consuming considerable time. I, therefore provide a connecting bar 11, Figs. 2 and 3, which is securely attached to the gage-block 8, and is fitted to slide freely on or through the block 10; A set screw 12 or any suitable clamping device isused to connect or disconnect the The connector 11 is preferably graduated to inches and fractions so as to indicate eX- actly the distance between the working face of the stop 5 and the upturned end of stop 9, and consequently the lengt-h of the tenon plus an amount necessary for trimming from the rough end of the stock with the cut-off saw.

- It will be seen that the stops 5 and 9 can be 'readily set to accommodate any lengt-h of tenon and the adjustment secured by the screw 12; then the duplex end stop thus formed can be instantly setfor any length of stockwithin the capacity of the gage strip D, by means ofthe clamp screw 13, and when any change in length of tenon is necessary, the'graduations on bar 11 render the change almost' instantaneous, without resort to a rule or scale.

y It will be understood that stop9 isa rough stop which is used in or during the formation of al first tenon on a piece vof stock, and is so set as to allow a slight saw cut on'the vend of such first tenon to make it square and of required length. .In Figs. 2 and 6 the stock has had a first ten'on made and its outer end cut off as indicated by the space between the end of the "tenon and the upturned end of the stop 9) and a tenon is loo yby heads 50, -stop 5 being used as the abso- 'bridge bar C. Formerly this bar has been clamped to -the rails A of the work table by means of a binding screw at each end, and frequently the clamping would be forgotten in setting up the machine for its vforlr, with the result that imperfect work was done and much time consumed in the adjustment. I have devised an instantaneous clamp which securely binds the bridge barv and is so arranged that it cannot be .left unclamped when Worlr is placed on the table.

14, Figs. 3, 4 and 5, is a cam shaft having bearings on the bar C, and placed transversely thereto, on Which is secured the cam or eccentric 15. A handle 16 is attached to the projecting end of the cam shaft for convenience in operating.

17 and 18 are clamping levers constructed to bear at one end against the under side of the table rails A, as shown in Figs. 3 and et, and to be held in clamping position by set bolts 19 and 20v/'bieb are threaded into a convenient part of the bridge bar C. The lever 18 is made long enough to reach past the center of the shaft 14 and to bear against the cam 15. Lever 17 is shorter and bears against the under surface of the lever 18 nearly opposite the cam 15. The set bolts 19 and 20 can be located near the centers longitudinally of the levers 17 and 18 and their heads thus form fulcrums, and at the same time they may be adjusted to equalize the clamping pressure on the outer ends of the levers and keep their inner ends in contact With the cam 15.

It is not strictly necessary in the above device that tWo clamping levers be used, as it Would be possible in many cases to clamp the bridge bar at one end only and secure the desired results, which consist chiefly in the speed and convenience of the clamping operation.

It will be seen by the above description, that the bar C can be instantaneously lclamped at any position on the table rails by pushing the lever 16 over so that the cam 15 forces the lever or levers 17, 18, into clamping contact With rails A, and it can be as instantaneously released by pulling handle 16 backward. Adjusting the bridge bar C carries With it the gage strip D, and

` thisin turn'carries the adjust-able stop gages scarcely enters into it: considering that in' incassa many shops such changes occur, perhaps Fifty times in the course of a days Work, the saving in the time of the operatoris evident. Furthermore, thefposition of the handle 16 is such that it projects considerably above the Work face of the table when the clamp levers are loosened, and thereby the operator is forced to clamp thebridge before placing thefivorlr on the table lt is not essential to my invention that the exact construction of clamping levers, fulcrums and actuating cam, shown herein, be followed in the carrying out of my device, but the drawings and description contain one embodiment of it z' other -equivalent constructions giving similairesults are no doubt possible; but

What I claim as my invention and desire to secure 'by Let-ters Patent is:

1. In a work table for a tenoning machine, an adjustable bridge bar, an adjustablef end stop gage attached to said bar, a clamping cam or eccentric mounted on said bar, a clamping member or members operatingv in conjunction With the cam to bind the bridge bar to the table, and an operating handle att-achedvto said cam, for the purposes set forth.

2. In a work table for tenoning machines, an adjustable bridge bar, an adjustable end stop gage attached to said bar, clamping members constructed to bind said bar to th table rails at both ends, an actuating means arranged to act on both clamping members atgone movement and a handle for operating said actuating means,for the purposes set forth. j

3. in a Work table for tenoning machines, an adjustable bridge bar, an adjustable end stop gage attached to said bar, a camshaft mounted transversely on saidbar, clamping levers bearing on the 'cam direct-ly or indirectly, an operating handle on said shaft, whereby both ends of the bridge bar are clamped and unclamped simultaneously.

d. In na Work table for a tenoning machine, an adjustable bridge bar, a cam c.

vadjustably to the other lfor the purposes set forth.

6. in a Werl; table for a Atenori machine, a pair of end stops comprising blocksadjustable on said table, a rod .or connector secured rigidly to one stop block and adjustably to the other, there being graduations on said rod', whereby the distance betvi'een said stops may be indicated :tor the purposes set forth.

,7; In a Work table for a Atenoning machine, a gage strip adjust-ably attached to said table,- duplex end stops constructed to be connected to or disconnected from each other, and both adjustable along said gage strip for the purposes set forth.'

8, In 'a Work table for a tenoning inac'hine, an adjustable' bridge bar, a longitudinal gage strip attached thereto7 end stops adjustable on said gage strip, said end stops being adapted to 'be connected to, or dis-v connected from each other for the purposes set forth.

9. In a Work table for a tenoning Inachine, the combination of lan adjustable bridge bar, a clamping cam and clamping members mounted thereon, a longitudinal gage strip attached thereto, duplex end stop gages `adjustable longitinlinall)v on said gage strip, and adapted to be connect-ed to or disconnected trom each other, all acting conjointly for the purposes set forth.

JOSEPH T. ZIKA.

Witnesses A F. C. WEIDEMAN,

E. C. IV. LANG. 

